Page 98 - 《橡塑技术与装备》英文版2026年3期

HINA R&P TECHNOLOGY AND EQUIPMENT

Design of extrusion die for tubular material with turbine-driven biaxial
orientation stretching device

1
2
2
Chen Liang , Zhang Youxin , Wang Pinyang , Wu Youcai 2
(1. Mingyang Smart Energy Group Co. LTD., Tianjin 528437, China;
2. Guangdong Jisu New Material Co. LTD., Dongguan 523527, Guangdong, China)
Abstract: This article introduces a design of an extrusion pipe head utilizing a turbine-traction biaxial
orientation stretching device. As the requirements for the use of plastic pipes continue to rise, the application
fields of plastic pipes are continuously expanding, and countries are imposing higher standards on the
performance of plastic pipes. Especially during the online production of PVC-O pipes, the positioning of the
orientation stretching device and precise heating control of the billet temperature are key technologies
for the self-reinforcement of biaxially oriented pipes. This not only makes it possible to maintain a stable
temperature during the orientation stretching process but also prevent uneven wall thickness and eccentricity
of the pipes due to misalignment between the billet and the orientation stretching device during online
production. Therefore, a design of an extrusion pipe head using a worm-wheel traction biaxial orientation
stretching device has been developed. The results show that by pulling the orientation stretching device at
different positions online, the billet can achieve smooth stretching and precise positioning under ideal heating
conditions, ensuring the uniformity of the molded pipe after overall expansion and improving the burst
resistance and toughness of the pipe.
Key words: turbine; traction; biaxial orientation stretching; position; move
Classification number: TQ330.41 Article number: 1009-797X(2026)03-0052-05
Document code: B DOI:10.13520/j.cnki.rpte.2026.03.015

With the significant increase in demand for plastic pipes, temperature and the melting temperature, if it is below the
the application fields of pipes are continuously expanding, glass transition temperature, the molecular chains are in a
and countries have raised higher requirements for the frozen state. Stretching at this temperature will only cause the
performance of plastic pipes. How to save materials while material to be forcibly stretched and damaged; if it is above
improving the overall performance of pipes is an important the melting temperature, the molecular chains can move
direction in the research of plastic pipes. Biaxial stretching freely, and the stretched molecular chains cannot achieve
self-reinforcement technology is a new production technology orientation. Only when the temperature is controlled between
for plastic pipes that has been developed in recent years. To the glass transition temperature and the melting temperature
achieve the production of biaxially stretched plastic pipes, is it particularly important, as it directly affects the quality of
the expansion method is commonly used. After secondary the pipe. It is best to achieve and maintain the most effective
heating treatment, the temperature of the pipe billet reaches molecular orientation near the softening point of the material.
the expansion temperature, and then it is expanded through
an expansion core mold connected to the extruder head under Biography: Chen Liang (1992-), male, holds a master's degree and
the traction force of a tractor. Since the stretching orientation is an engineer. He is primarily engaged in the analysis and optimization of
mechanical structure simulation performance, as well as research on new
of polymer materials occurs between the glass transition materials.

·52· Vol.52，No.3